Based on the ReOs isochron age (40.3 5.6Ma) of disseminated molybdenite from the Chongmuda skarntype CuAu deposit in Gangdisê, Tibet, two sets of ReOs isochron ages for the orefield were obtained. The molybdenite ReOs isochron age of blind porphyrytype molybdenum deposit is 30.26±0.69Ma and spotted molybdenite ReOs isochron age of Nuri layered skarntype WCu Mo deposit superimposed by later quartz diorite porphyry is 23.62±0.97Ma. Starting with the new understanding of strikeslip marginal metallogenesis, this paper summarizes the characters of marginal strikslipping metallogenesis, and spatialtemporal distribution of porphyry deposits in the Gangdisê metallogenic belt. ① The porphyrytype deposits and stratiform skarn deposits are the primary types of the known mediumandlargesized copper polymetallic deposits in the belt. ② Early (68~38Ma) deposits were controlled by the 1storder and 2ndorder leftlateral strikeslip transforming structure in the strikeslip convergent stage of the "IndiaAsian continental margin", while late (30~13Ma) deposits by the 3rdorder and 4thorder leftlateral strikeslip transforming structure in the divergent strikeslip stage of the "IndiaAsian continental margin". ③ The formation of ore bodies in porphyrytype deposits is subject to strikeslip holding faults, while the formation of ore bodies of stratiform skarn deposit is subject to strikeslip dragging faults. ④ The stress field of regional strikeslip transform oreforming structure is characterized by anticlockwise rotation, which indicates that during 68~13Ma, the Indian Continent spliced obliquely towards northern northeast relative to the Asian Continent, and was replaced by the extensionaldominated stress field during the formation of SouthNorth collisional rift at 13~8Ma. At last, this study outlines the orientation for ore exploration: molybdenum and tungsten deposits along the margin, and CuAu polymetallic along strikeslip transforming structure belt, with a main target at rich and large compound porphyrytype and stratabound skarntype deposits.